### Install getmail 6 via setup.py

Source: https://getmail6.org/documentation.html

Install getmail 6 from the source distribution using the setup script.

```bash
# python setup.py install
```

--------------------------------

### Display default installation directories

Source: https://getmail6.org/documentation.html

Lists the paths where getmail components will be installed by default.

```bash
# python setup.py --show-default-install-dirs
```

--------------------------------

### Install to an alternate prefix

Source: https://getmail6.org/documentation.html

Use the --prefix option to install the package into a custom directory, useful for non-root installations.

```bash
# python setup.py install --prefix=path
```

--------------------------------

### Define parameter tuples

Source: https://getmail6.org/configuration.html

Example syntax for defining parameter tuples in a configuration file.

```text
parameter = (
    ("first-a", "first-b"),
    ("second-a", "second-b"),
    ("third-a", "third-b"),
    )
```

```text
parameter = (
    ("lone-a", "lone-b"),
    )
```

--------------------------------

### Customize installation directories

Source: https://getmail6.org/documentation.html

Use specific flags to override default paths for scripts, libraries, or documentation.

```bash
# python setup.py --install-scripts=/usr/local/bin/
```

```bash
# python setup.py --install-scripts=/usr/local/bin/ --install-data=/usr/local/
```

--------------------------------

### Configure SSL Ciphers

Source: https://getmail6.org/configuration.html

Example configuration to downgrade security level for specific connection errors.

```ini
ssl_ciphers = DEFAULT@SECLEVEL=1
```

--------------------------------

### Configure mh mail root

Source: https://getmail6.org/faq.html

Example configuration line for .mh_profile.

```text
Path: Mail
```

--------------------------------

### Install getmail to default location

Source: https://getmail6.org/documentation.html

Requires root privileges to install into the system's default Python site-packages and bin directories.

```bash
# su
enter root password
# python setup.py install
```

--------------------------------

### Configure getmail options

Source: https://getmail6.org/configuration.html

Example configuration for quiet operation, retrieving only new mail, deleting retrieved messages, and logging to a file.

```ini
[options]
verbose = 0
read_all = false
delete = true
message_log = ~/.getmail/log
```

--------------------------------

### Configure MDA_qmaillocal destination

Source: https://getmail6.org/configuration.html

Basic and complex configuration examples for the MDA_qmaillocal destination class.

```ini
[destination]
type = MDA_qmaillocal
user = joyce
```

```ini
[destination]
type = MDA_qmaillocal
user = joyce
```

--------------------------------

### Configure MDA_external for mh/nmh

Source: https://getmail6.org/faq.html

Example destination configuration for using rcvstore with getmail.

```ini
[destination]
type = MDA_external
path = /usr/local/libexec/nmh/rcvstore
arguments = ("+inbox", )
```

--------------------------------

### Configure Mboxrd Destination

Source: https://getmail6.org/configuration.html

Example configuration for delivering messages to an mboxrd-format file in the user's home folder.

```ini
[destination]
type = Mboxrd
path = ~/inbox
```

--------------------------------

### Install getmail 6 via pip

Source: https://getmail6.org/documentation.html

Use pip to install the getmail6 package globally or for the current user.

```bash
# sudo pip install getmail6
```

```bash
# pip install --user getmail6
```

--------------------------------

### Configure Maildir Destination

Source: https://getmail6.org/configuration.html

Example configuration for delivering messages to a Maildir directory in the user's home folder.

```ini
[destination]
type = Maildir
path = ~/Maildir/
```

--------------------------------

### Configure MultiGuesser for mail routing

Source: https://getmail6.org/configuration.html

Example configuration for routing personal mail to a default maildir and mailing list mail to specific directories.

```ini
[destination]
type = MultiGuesser
default = ~/Maildir/
locals = (
    ("list-address-1@list-domain-1", "~/Mail/mailing-lists/list-1/"),
    ("list-address-2@list-domain-2", "~/Mail/mailing-lists/list-2/"),
    )
```

--------------------------------

### Modify script path for custom installation

Source: https://getmail6.org/documentation.html

Insert this line into getmail scripts to explicitly add the installation directory to the Python module search path.

```python
sys.path.append('/path/to/installation-directory')
```

```python
import sys
```

--------------------------------

### Configure IMAP search and deletion flags

Source: https://getmail6.org/configuration.html

Examples for setting imap_search and imap_on_delete parameters to control message retrieval and server-side flag updates.

```text
imap_search = UNSEEN
```

```text
imap_search = Unseen
imap_on_delete = \Seen
```

```text
imap_search = ALL
imap_on_delete = (\Deleted \Seen)
```

--------------------------------

### Define retriever section header

Source: https://getmail6.org/configuration.html

The mandatory header for starting the retriever configuration block.

```text
[retriever]
```

--------------------------------

### Set PYTHONPATH for non-standard installation

Source: https://getmail6.org/documentation.html

Use this environment variable to point Python to the directory containing the getmailcore package.

```bash
# export PYTHONPATH=$HOME/tmp/getmail/lib/python3.8/site-packages .
```

--------------------------------

### Configure Filter_classifier for spam classification

Source: https://getmail6.org/configuration.html

Example configuration for using a custom classifier program to add information to message headers.

```ini
[filter-3]
type = Filter_classifier
path = /path/to/my-classifier
arguments = ('--message-from-stdin', '--report-to-stdout')
user = nobody
```

--------------------------------

### Troubleshoot MemoryError on OS X

Source: https://getmail6.org/faq.html

Example of the error output seen on OS X when the system's realloc() implementation fails.

```text
python2.5(27172) malloc: *** vm_allocate(size=15699968) failed (error code=3)
python2.5(27172) malloc: *** error: can't allocate region
python2.5(27172) malloc: *** set a breakpoint in szone_error to debug
[...]
```

--------------------------------

### Configure Filter_external for attachment stripping

Source: https://getmail6.org/configuration.html

Example configuration for using an external MIME filter to remove specific attachment types from messages.

```ini
[filter-3]
type = Filter_external
path = /path/to/my-mime-filter
arguments = ('--message-from-stdin', '--remove-all-but-attachment-types=text/plain,text/rfc822')
user = nobody
```

--------------------------------

### Create getmail configuration directory

Source: https://getmail6.org/configuration.html

Sets up the default configuration directory with restricted permissions.

```bash
mkdir -m 0700 $HOME/.getmail
```

--------------------------------

### Build binary package from source

Source: https://getmail6.org/documentation.html

Execute this command within the unpacked source directory to generate a binary package.

```bash
# cd getmail-version
# python setup.py bdist --format=package-format
```

--------------------------------

### Run getmail with custom directory and configuration files

Source: https://getmail6.org/configuration.html

Specify a custom directory for configuration and data files while providing multiple rc files.

```bash
$ getmail --getmaildir /path/to/otherdir --rcfile getmailrc-account1 --rcfile getmailrc-account2
```

--------------------------------

### Run getmail with multiple configuration files

Source: https://getmail6.org/configuration.html

Execute getmail using specific configuration files located in the default directory.

```bash
$ getmail --rcfile getmailrc-account1 --rcfile getmailrc-account2
```

--------------------------------

### Build getmail from source

Source: https://getmail6.org/documentation.html

Run these commands within the source directory to compile the package.

```bash
# cd getmail-version
# python setup.py build
```

--------------------------------

### Configure SimplePOP3SSLRetriever

Source: https://getmail6.org/configuration.html

Configuration for POP3 access over SSL.

```ini
[retriever]
type = SimplePOP3SSLRetriever
server = popmail.isp.example.net
username = account_name
password = my_mail_password

```

--------------------------------

### Configure MultiDestination with path shortcuts

Source: https://getmail6.org/configuration.html

Uses path shortcuts for Maildir destinations by ensuring the path ends with a slash.

```ini
destinations = ('~/Mail/inbox/', '~/Mail/archive/current/')
```

--------------------------------

### Configure SimplePOP3Retriever

Source: https://getmail6.org/configuration.html

Standard configuration for a basic POP3 mail account.

```ini
[retriever]
type = SimplePOP3Retriever
server = popmail.isp.example.net
username = account_name
password = my_mail_password

```

--------------------------------

### Scan configuration directory

Source: https://getmail6.org/faq.html

Command to scan the default configuration directory.

```bash
getmails
```

--------------------------------

### Configure password_command

Source: https://getmail6.org/configuration.html

Specifies an external program to retrieve the account password, provided as a tuple of strings.

```text
password_command = ("/path/to/password-retriever", "-p", "myaccount@example.org")
```

--------------------------------

### Configure SimpleIMAPRetriever

Source: https://getmail6.org/configuration.html

Configuration for IMAP accounts requiring multiple folder retrieval and specific move-on-delete behavior.

```ini
[retriever]
type = SimpleIMAPRetriever
server = imapmail.isp.example.net
username = account_name
password = my_mail_password
mailboxes = ("INBOX", "lists.unix", "lists.getmail")
move_on_delete = mail.deleted

```

--------------------------------

### Configure MultidropPOP3Retriever

Source: https://getmail6.org/configuration.html

Configuration for domain POP3 mailboxes delivering to multiple local users.

```ini
[retriever]
type = MultidropPOP3Retriever
server = imapmail.isp.example.net
username = account_name
password = company_maildrop_password
envelope_recipient = delivered-to:1

```

--------------------------------

### Test hostname resolution speed

Source: https://getmail6.org/troubleshooting.html

Use this command to determine if initialization delays are caused by slow fully-qualified hostname lookups.

```python
python -c "import socket; print socket.getfqdn()"
```

--------------------------------

### Configure SimplePOP3Retriever with Custom Port

Source: https://getmail6.org/configuration.html

Use this configuration when the ISP requires a non-standard port for POP3 access.

```ini
[retriever]
type = SimplePOP3Retriever
server = popmail.isp.example.net
port = 8110
username = account_name
password = my_mail_password

```

--------------------------------

### Create an mboxrd file

Source: https://getmail6.org/faq.html

Shell command to create an empty file for mboxrd storage.

```bash
$ touch /path/to/mboxrd
```

--------------------------------

### Configure SSL Version for Gmail

Source: https://getmail6.org/faq.html

Workaround for OpenSSL 1.1.1+ connection errors by forcing TLSv1.2 in the retriever configuration.

```ini
[retriever]
...
ssl_version = tlsv1_2
```

--------------------------------

### Configure getmail for mbox delivery

Source: https://getmail6.org/faq.html

Use this configuration to retrieve mail from a single-user POP3 account and append it to an mbox file.

```ini
[options]
delete = True

[retriever]
type = SimplePOP3Retriever
server = my-pop3-servername
username = my-pop3-username
password = my-pop3-password

[destination]
type = Mboxrd
path = ~/inbox
```

--------------------------------

### Enable ClamAV Daemon Support

Source: https://getmail6.org/faq.html

Required setting in clamav.conf to enable the daemonized version of ClamAV.

```text
ScanMail
```

--------------------------------

### Configure IMAP mailboxes

Source: https://getmail6.org/configuration.html

Defines a list of mailbox paths for IMAP retrieval using a Python tuple.

```text
mailboxes = ("INBOX", "INBOX.spam",
    "mailing-lists.model-railroading")
```

--------------------------------

### Configure getmail for Maildir delivery

Source: https://getmail6.org/faq.html

Use this configuration to retrieve mail from a single-user POP3 account and store it in a Maildir directory.

```ini
[options]
delete = True

[retriever]
type = SimplePOP3Retriever
server = my-pop3-servername
username = my-pop3-username
password = my-pop3-password

[destination]
type = Maildir
path = ~/Maildir/
```

--------------------------------

### Configure MultiDestination for an mboxrd file

Source: https://getmail6.org/configuration.html

Routes messages to a specific mboxrd file path.

```ini
[destination]
type = MultiDestination
destinations = ("/var/spool/mail/alice", )
```

--------------------------------

### Create a maildir

Source: https://getmail6.org/faq.html

Shell command to create the necessary directory structure for a maildir.

```bash
$ mkdir -p /path/to/Maildir/{cur,new,tmp}
```

--------------------------------

### Configure F-Prot Filter

Source: https://getmail6.org/faq.html

Integration of F-Prot using a wrapper script as an external filter.

```ini
[filter]
type = Filter_external
path = /usr/local/bin/f-prot-wrapper.sh
```

--------------------------------

### Configure MDA_lmtp with override and fallback

Source: https://getmail6.org/configuration.html

Configuration for routing mail to an override recipient with a fallback address for permanent failures.

```ini
[destination]
type = MDA_lmtp
host = mail.example.com
override = alice
fallback = bob
```

--------------------------------

### Configure MDA_lmtp via Unix socket

Source: https://getmail6.org/configuration.html

Configuration for delivering messages to a local Dovecot LMTP socket.

```ini
[destination]
type = MDA_lmtp
host = /run/dovecot/lmtp
```

--------------------------------

### Configure MultiSorter locals with raw strings

Source: https://getmail6.org/configuration.html

Defines regular expression patterns for MultiSorter, using 'r' prefixes for patterns containing backslashes.

```ini
locals = (
    (r'jeff\?\?\?@.*', '[jeff]'),
    ('alice@', '[alice]')
    )

locals = (
    ('jeff@.*', '[jeff]'),
    (r'alice\D+@', '[alice]')
    )
```

--------------------------------

### Basic MultiSorter Configuration

Source: https://getmail6.org/configuration.html

Routes mail to specific maildirs based on recipient address patterns.

```ini
[destination]
type = MultiSorter
default = [bob-default]
locals = (
    ('jeff@example.net', '[jeff]'),
    ('alice@', '[alice]')
    )

[jeff]
type = Maildir
path = ~jeff/Maildir/
user = jeff

[alice]
type = Mboxrd
path = ~alice/inbox
user = alice

[bob-default]
type = Maildir
path = ~bob/Maildir/
user = bob
```

--------------------------------

### Add comments to getmailrc

Source: https://getmail6.org/configuration.html

Syntax for adding comments to a configuration file using the pound sign.

```ini
first_parameter = value
```

--------------------------------

### Common SSL Root Certificate Locations

Source: https://getmail6.org/configuration.html

Standard file system paths for OS-supplied SSL root certificates.

```text
/etc/ssl/certs/
```

```text
/etc/pki/tls/certs/
```

```text
/usr/local/share/certs/
```

```text
/etc/ssl/
```

```text
/System/Library/OpenSSL/certs/
```

--------------------------------

### Configure all IMAP mailboxes

Source: https://getmail6.org/configuration.html

Uses the ALL keyword to retrieve messages from all selectable IMAP mailboxes.

```text
mailboxes = ALL
```

--------------------------------

### Define getmailrc parameter

Source: https://getmail6.org/configuration.html

Syntax for declaring a parameter within a configuration section.

```ini
parameter_name = parameter_value
```

--------------------------------

### Configure MultiDestination for a specific user maildir

Source: https://getmail6.org/configuration.html

Routes messages to a user-specific Maildir path.

```ini
[destination]
type = MultiDestination
destinations = ("~jeff/Maildir/", )
```

--------------------------------

### Configure IMAP fetch size optimization

Source: https://getmail6.org/configuration.html

Enables skipping RFC822.SIZE to improve performance with certain proxies.

```text
skip_imap_fetch_size
```

```text
max_message_size
```

```text
max_bytes_per_session
```

```text
delete_bigger_than
```

--------------------------------

### Command line search and set parameter

Source: https://getmail6.org/configuration.html

The command line parameter used to override imap_search and imap_on_delete.

```text
--searchset/-s
```

--------------------------------

### Define multi-line parameter

Source: https://getmail6.org/configuration.html

Syntax for spanning a parameter value across multiple lines using leading whitespace.

```ini
first_parameter = value
    first parameter value continues here
second_parameter = value
```

--------------------------------

### Configure Filter_TMDA for challenge-response

Source: https://getmail6.org/configuration.html

Minimal configuration for enabling TMDA filtering using default parameters.

```ini
[filter-3]
type = Filter_TMDA
```

--------------------------------

### Define getmailrc section header

Source: https://getmail6.org/configuration.html

Syntax for declaring a section header in a configuration file.

```ini
[section name]
```

--------------------------------

### Configure MultiDestination with an external MDA

Source: https://getmail6.org/configuration.html

Routes messages to an external MDA defined in a separate section.

```ini
[destination]
type = MultiDestination
destinations = ("[procmail-as-bob]", )

[procmail-as-bob]
type = MDA_external
path = /path/to/procmail
arguments = ('~bob/.procmailrc', '-f', '%(sender)')
user = bob
```

--------------------------------

### Deliver mail to an mbox file using getmail_mbox

Source: https://getmail6.org/configuration.html

Delivers a message from stdin to a specified mboxrd-format file path.

```bash
$ getmail_mbox $HOME/mail/inbox
```

--------------------------------

### Configure complex MDA_external destination

Source: https://getmail6.org/configuration.html

Advanced configuration using user/group switching and message recipient substitution.

```ini
[destination]
type = MDA_external
path = /path/to/mymda
# Switch to fred's UID and the mail group GID before delivering his mail
user = fred
group = mail
arguments = ("--strip-forbidden-attachments", "--recipient=%(recipient)")
```

--------------------------------

### Configure procmail as MDA

Source: https://getmail6.org/faq.html

Methods to invoke procmail as an external MDA, ensuring correct Unix From line handling.

```ini
[destination]
type = MDA_external
path = /path/to/procmail
unixfrom = True
```

```ini
[destination]
type = MDA_external
path = /path/to/procmail
arguments = ("-f", "%(sender)")
```

--------------------------------

### Run getmail in daemon mode

Source: https://getmail6.org/faq.html

A simple shell script for process-supervision systems to run getmail periodically.

```bash
#!/bin/sh

/path/to/getmail [options]
sleep 1800
```

--------------------------------

### ClamAV Filter Configuration

Source: https://getmail6.org/faq.html

Configure getmail to use clamscan for virus filtering.

```ini
[filter]
type = Filter_classifier
path = /usr/local/bin/clamscan
arguments = ("--stdout", "--no-summary",
    "--mbox", "--infected", "-")
exitcodes_drop = (1,)
```

--------------------------------

### Advanced MultiSorter with External MDA

Source: https://getmail6.org/configuration.html

Routes mail to multiple destinations including an external MDA for logging.

```ini
[destination]
type = MultiSorter
default = doesn't matter, this won't be used, as locals will always match
locals = (
    ('^jeff@', '[jeff]'),
    ('^bob@', '[bob]'),
    ('^alice@', '[alice]'),
    ('.', '[copies]'),
    ('.', '[info]')
    )

[alice]
type = Maildir
path = ~alice/Maildir/
user = alice

[bob]
type = Maildir
path = ~bob/Maildir/
user = bob

[jeff]
type = Maildir
path = ~jeff/Maildir/
user = jeff

[copies]
type = Maildir
path = ~samantha/Mail/archive/copies/
user = samantha

[info]
type = MDA_external
path = /path/to/infologger
arguments = ('--log=/var/log/mail/info', '--sender=%(sender)', '--recipient=%(recipient))
user = log
```

--------------------------------

### Define a string parameter

Source: https://getmail6.org/configuration.html

Specify a string value without special syntax.

```text
parameter = my value
```

--------------------------------

### Configure local domain and translation

Source: https://getmail6.org/configuration.html

Sets the local domain and defines a translation rule for message recipients.

```text
# The mail domain isn't the normal FQDN of the server running getmail
localdomain = host.example.net
# Trim the server's virtualdomain prepend value from message recipient before
# sending it to qmail-local
localpart_translate = ('mailhostaccount-', '')
```

--------------------------------

### Conditional Execution via Flag File

Source: https://getmail6.org/faq.html

Use a flag file to conditionally run getmail from a cron job.

```bash
[ -f ~/.getmail/do-not-run ] || /path/to/getmail
```

```bash
$ touch ~/.getmail/do-not-run
```

```bash
$ rm -f ~/.getmail/do-not-run
```

--------------------------------

### Configure maildrop as MDA

Source: https://getmail6.org/faq.html

Various configurations for using maildrop as an external MDA, including support for custom rc files.

```ini
[destination]
type = MDA_external
path = /path/to/maildrop
arguments = ("-f", "%(sender)")
```

```ini
[destination]
type = MDA_external
path = /path/to/maildrop
unixfrom = True
```

```ini
[destination]
type = MDA_external
path = /path/to/maildrop
arguments = ("-f", "%(sender)", "~/.maildroprc")
```

--------------------------------

### Deliver mail using getmail_maildir

Source: https://getmail6.org/configuration.html

Pipe a message to getmail_maildir to deliver it to a specified maildir path.

```bash
$ getmail_maildir $HOME/Maildir/
```

--------------------------------

### Define an integer parameter

Source: https://getmail6.org/configuration.html

Specify an integer value without special syntax.

```text
parameter = 4150
```

--------------------------------

### Configure complex MultiDestination routing

Source: https://getmail6.org/configuration.html

Combines multiple destination types including maildirs, mboxrd, and external MDAs.

```ini
[destination]
type = MultiDestination
destinations = (
    "~jeff/Mail/inbox",
    "[procmail-as-jeff]",
    "/var/mail-archive/incoming"
    )

[procmail-as-jeff]
type = MDA_external
path = /path/to/procmail
arguments = ('~jeff/.procmailrc', '-f', '%(sender)')
user = jeff
```

--------------------------------

### Configure MDA_external destination

Source: https://getmail6.org/configuration.html

Basic configuration for invoking an external message delivery agent.

```ini
[destination]
type = MDA_external
path = /path/to/mymda
arguments = ("--log-errors", )
```

--------------------------------

### Configure cache_uid setting

Source: https://getmail6.org/configuration.html

Sets the cache_uid option to true to use the highest UID from the oldmail-file.

```text
true
```

--------------------------------

### Configure MultiDestination with named sections

Source: https://getmail6.org/configuration.html

Defines a MultiDestination that routes messages to two separate destination sections.

```ini
destinations = ('[other-destination-1]', '[other-destination-2]')

[other-destination-1]
type = Mboxrd
path = /var/spool/mail/alice
user = alice

[other-destination-2]
type = Maildir
path = /home/joe/Maildir/
user = joe
```

--------------------------------

### Configure MDA_lmtp via remote host

Source: https://getmail6.org/configuration.html

Configuration for delivering messages to a remote LMTP server on a specific port.

```ini
[destination]
type = MDA_lmtp
host = mail.example.com
port = 3333
```

--------------------------------

### Automate multiple getmail rc files

Source: https://getmail6.org/faq.html

A shell script to iterate through rc files in a directory and execute getmail with them.

```bash
#!/bin/sh
set -e
cd /path/to/my-rc-directory
rcfiles=""
for file in rc-* ; do
  rcfiles="$rcfiles --rcfile $file"
done
exec /path/to/getmail $rcfiles $@
```

--------------------------------

### SpamAssassin Header Ignore Configuration

Source: https://getmail6.org/faq.html

Prevent SpamAssassin from learning getmail-specific headers by adding this to the SpamAssassin configuration.

```text
bayes_ignore_header X-getmail-filter-classifier
```

--------------------------------

### Identify Server Root CA

Source: https://getmail6.org/configuration.html

Use this command to determine the root CA used to sign a server's certificate chain.

```bash
openssl s_client -showcerts -connect HOST:PORT < /dev/null 2>/dev/null \
  | grep '^[[:space:]]*i:' | tail -n 1
```

--------------------------------

### Configure ClamAV Filter for getmail

Source: https://getmail6.org/faq.html

Configuration for using ClamAV to filter emails, with options to either drop or keep infected messages.

```ini
[filter]
type = Filter_classifier
path = /usr/local/bin/clamscan
arguments = ("--stdout", "--no-summary",
    "--mbox", "--infected", "-")
exitcodes_keep = (0,1)
```

```ini
[filter]
type = Filter_classifier
path = /usr/local/bin/clamdscan
arguments = ("--stdout", "--disable-summary", "-")
exitcodes_drop = (1, )
```

```ini
[filter]
type = Filter_classifier
path = /usr/local/bin/clamdscan
arguments = ("--stdout", "--disable-summary", "-")
exitcodes_keep = (0,1)
```

--------------------------------

### POP3 Retriever Parameters

Source: https://getmail6.org/configuration.html

Additional optional parameters specific to POP3 retrievers.

```APIDOC
## POP3 Retriever Parameters

### Optional Parameters
- **use_xoauth2** (boolean) - Whether to use XOAUTH2 for login with the POP3 server.
```

--------------------------------

### Define a tuple of quoted strings

Source: https://getmail6.org/configuration.html

A list of strings enclosed in parentheses, requiring specific handling for empty or single-item tuples.

```text
parameter = ('first string', 'second string',
    "third string that contains a ' character")
```

```text
parameter = ()
```

```text
parameter = ("single string", )
```

--------------------------------

### Specify ClamAV Decompression Utilities

Source: https://getmail6.org/faq.html

Additional arguments to define paths for decompression utilities used by ClamAV.

```ini
arguments = ( …,
    "--unzip=/usr/local/bin/unzip",
    "--unrar=/usr/local/bin/unrar",
    "--unarj=/usr/local/bin/unarj",
    "--lha=/usr/local/bin/lha",
    "--jar=/usr/local/bin/unzip",
    "--tar=/usr/bin/tar",
    "--tgz=/usr/bin/tar"
```

--------------------------------

### Define a tuple of integers

Source: https://getmail6.org/configuration.html

A list of integers enclosed in parentheses, similar to string tuples but without quotes.

```text
parameter = (1, 2, 3, 4, 5)
parameter = (37, )
parameter = ()
```

--------------------------------

### IMAP Retriever Parameters

Source: https://getmail6.org/configuration.html

Additional optional parameters specific to IMAP retrievers.

```APIDOC
## IMAP Retriever Parameters

### Optional Parameters
- **mailboxes** (tuple of quoted strings) - A list of mailbox paths to retrieve mail from.
```

--------------------------------

### Define Destination Section Header

Source: https://getmail6.org/configuration.html

The mandatory header for the destination section in the rc file.

```ini
[destination]

```

--------------------------------

### Unpack getmail tarball

Source: https://getmail6.org/documentation.html

Commands to extract the getmail source distribution on different Unix-like systems.

```bash
# tar xzf getmail-version.tar.gz
```

```bash
# gunzip getmail-version.tar.gz
# tar xf getmail-version.tar
```

--------------------------------

### SpamAssassin Filter Configuration

Source: https://getmail6.org/faq.html

Configure getmail to filter messages through SpamAssassin using either client/server or standalone modes.

```ini
[filter]
type = Filter_external
path = /usr/local/bin/spamc
arguments = ("-s", "10000")
```

```ini
[filter]
type = Filter_external
path = /usr/local/bin/spamassassin
arguments = ("--report", )
```

--------------------------------

### Common Retriever Parameters

Source: https://getmail6.org/configuration.html

Parameters required or optional for all retriever types in getmail.

```APIDOC
## Common Retriever Parameters

### Required Parameters
- **server** (string) - The name or IP address of the server to retrieve mail from.
- **username** (string) - Username to provide when logging in to the mail server.

### Optional Parameters
- **port** (integer) - The TCP port number to connect to.
- **password** (string) - Password to use when logging in to the mail server.
- **password_command** (tuple of quoted strings) - Retrieve the account password by running an arbitrary external program.
```

--------------------------------

### Define filter section header

Source: https://getmail6.org/configuration.html

The required header format for defining a filter section in the getmail configuration file.

```ini
[filter-something]
```

--------------------------------

### Uninstall getmail 6 via pip

Source: https://getmail6.org/documentation.html

Remove the getmail6 package using pip.

```bash
# sudo pip uninstall getmail6
```

```bash
# pip uninstall getmail6
```

--------------------------------

### Rename Filter Headers with reformail

Source: https://getmail6.org/faq.html

Use an external filter to rename the X-getmail-filter-classifier header for better auditability.

```ini
type = Filter_external
path = /usr/local/bin/reformail
arguments = ("-R", "X-getmail-filter-classifier:",
    "X-mypersonalmailscan:")
```

--------------------------------

### Specify retriever type

Source: https://getmail6.org/configuration.html

Assign the specific retriever class name to the type parameter.

```text
type = typename
```

--------------------------------

### Configure envelope_recipient for MultidropPOP3Retriever

Source: https://getmail6.org/configuration.html

Specifies the header field and position to identify the envelope recipient address.

```text
envelope_recipient = delivered-to:1
```

--------------------------------

### Prevent Concurrent Instances with setlock

Source: https://getmail6.org/faq.html

Use setlock to ensure only one instance of getmail runs at a time.

```bash
/path/to/setlock -n /path/to/lockfile /path/to/getmail [getmail options]
```

--------------------------------

### Configure TMDA Filter

Source: https://getmail6.org/faq.html

Using the Filter_TMDA module as a message filter.

```ini
[filter-X]
type = Filter_TMDA
```

--------------------------------

### Edit Crontab

Source: https://getmail6.org/faq.html

Command to open the crontab editor for modifying scheduled tasks.

```bash
$ crontab -e
```

--------------------------------

### Define a boolean parameter

Source: https://getmail6.org/configuration.html

Boolean values accept various case-insensitive representations for true and false.

```text
parameter = True
parameter = false
parameter = NO
parameter = 1
```

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